Photoresist Chemicals 1,2,4-Triazolo[4,3-a]pyrimidine-6-carboxylic acid, 3-(4-fluorophenyl)-1,5-dihydro-7-methyl-1-(4-nitrophenyl)-5-phenyl-, ethyl ester Cas：927833-54-3 Molecular Formula：C27H22FN5O4